Saw construction



y 19.56 E. E. LINDENBEIN .sAw CONSTRUCTION Filed Jan.

Fig-l ,32 64 Fig.2

W a 6i 4 Edwin Emil Lindenbein INVENTOR.

9 BY Wm.

ite States Pate 2,755,556 Patented July 24, 1956 SAW CONSTRUCTION EdwinEmil Lindenbein, Los Angeles, Calif.

Application January 3, 1952, Serial No. 264,771

1 Claim. (Cl. 33-75) This invention relates to new and usefulimprovements in saw structures and more particularly to saws havingmeasuring facilities combined therewith, such as that disclosed in mycopending application Serial Number 184,546, filed September 13, 1950,now Patent No. 2,677,184, granted May 4, 1954.

The primary object of the present invention is to provide a saw havingthe necessary elements combined therein to permit use of the saw indetermining angles, laying oif straight lines, arcs, circles, and forsquaring and levelmg.

Another important object of the present invention is to provide a noveland improved handle attachment for saws that will pivotally support aprotractor which is movable into a recess in the handle to provide astraight extension for the straight edge of a saw.

A further object of the present invention is to provide a saw structurecapable of replacing a plurality of relatively large and bulkyinstruments necessary for construction workers and which saw structureis extremely light in weight to facilitate the convenient handlingthereof.

A still further aim of the present invention is to provide a saw of theaforementioned character that is simple and practical in structure,strong and reliable in use, small and compact in construction,inexpensive to manufacture, and otherwise well adapted for the purposesfor which the same is intended.

Other objects and advantages reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming part hereof, wherein likenumerals are employed to designate like parts throughout, and in which:

Figure 1 is a side elevational view of the present invention;

Figure 2 is an enlarged fragmentary top plan view of Figure 3;

Figure 3 is an enlarged fragmentary side view similar to Figure 1 butshowing the protractor pivoted to an inclined angle relative to thestraight edge of the saw, and with part of the handle broken away toshow the pivot means housed in the handle;

Figure 4 is a side elevational view from the opposite side of Figure 3;and,

Figure 5 is an enlarged vertical sectional view taken substantially onthe plane of the section line 55 of Figure 1.

Referring now to the drawings in detail, wherein for the purpose ofillustration, there is disclosed a preferred embodiment of the presentinvention, the numeral represents a saw blade having its enlarged rearend received in a slot 12 in the forward end portion of a handle 14. Therear end of the blade is formed with a plurality of apertures 16 thatregister with apertures 18 in the handle.

Bushings 20 are fitted in the apertures 16 and receive fasteners 22whose heads are positioned in large recesses 24 in the side faces of thehandle. One pair of registering apertures 26 in the handle and bladereceive a pair of threadingly connecting fastener-halves 28 whose headedends enter countersinks 30 in the side of the handle.

Saw blade 10 is provided with a straight back or upper edge 32 to permituse of the blade in taking lineal measurements and as a part of a squareand protractor. Longitudinally spaced notches 34 in the edge 32 aredisposed in six inch lengths for use with or independently of a combinedsquare, protractor and ruler member 36 whose fiat edge element 38 isgraduated in inches and fractions of inches up to and including sixinches.

A flange 40 forms part of member 36 and extends at right angles thereto.Flange 40 is formed with a lateral projection 42 at one end that ispivotally secured within the front end of slot 12 adjacent the edge 32by the pivot 28. A spirit level 46 is supported on the underside ofelement 38 opposite the end thereof that is longitudinally slotted toaccommodate the edge 32 when the member 36 is pivoted away from thehandle.

Means is provided for releasably holding the member 36 adjusted aboutits pivot 28 and this means comprises a bolt 48 that is secured to thehandle and which passes through an arcuate slot 56 in projection 42. Thethreaded end of bolt 48 enters a recess 52 in one side of the handle andreceivably engages a wing nut 54 that is manually tightened to clampprojection 42 against the rear end of the blade.

Plate portion or projection 42 is provided with quadrant scale 56 on oneside adjacent a curved edge 58 thereof which is concentric with thepivot 28. Blade 10 is notched adjacent the quadrant scale to provide apointer forming edge 60 disposed radially of the pivot.

A long recess 62 in the upper edge of the handle will accommodate theflange 40 and level bubble 46 when member 36 is pivoted against thehandle. A blind bore or chamber 63 extends into the handle laterallyfrom the recess 62 and holds removable pointers or pivots 64 and 66 eachof which is formed with a transverse slot and a threaded bore receivablyengaging set screws that extend into the slots to bind against the edgeof the saw blade received in the slot.

A pivotal plate or closure element 68 is pivotally mounted in the recess62 and is swingable outwardly from the open side of the recess 62 topermit removal of the pointers 64, 66 from bore 63. A finger grip 70 onthe element 68 forms a convenient means for pivoting the plate into orout of the recess 62.

Handle 14 is integrally formed with a pair of rearwardly extending lugs72 between which the users hand will be received. These lugs areprovided with flat rear faces 74 that lie in a plane perpendicular tothe plane of edge 32. The forward edges 76 of the handle 14 also extendperpendicular to edge 14 and are notched to receive the forward end ofelement 38 so that element 38 will be flush with edges 76 when element38 is disposed perpendicular to edge 32. Element 38 will be flush withedge 32 when the member 36 is swung into recess 62.

The rear end of member 36 supports a pointer element 78 that projectslaterally outwardly from the handle to permit the blade 10 to be pivotedfor striking arcs or circles with one of the pointers 64 or 66functioning as a scriber.

Blade 11 is formed with a U-shaped notch 80 at its forward end with itstransversely disposed edge 82 sharpened to permit use of the blade 10 asa chisel or scraper. When used in this capacity, the hand grip or handle14 is also employed as a gripping device.

The side faces of the handle 14 are formed with recesses 83 in whichcharts or indicia bearing plates 84 are mounted. These charts areprovided with numerals correlated with the angle markings on the member36 so that for a given angle, determined by use of the blade 10 andmember 36 as a protractor, the length beams for roof pitch may bedetermined; also the height of any building structure.

By placing the surfaces 74 of the lugs 72 against a vertical orhorizontal surface member 36 may be employed for determining angles withrespect to surfaces 74 and/or edge 32.

Having described the invention, What is claimed as new is:

A measuring device comprising an elongated straight edge, a handlesecured to one end of the straight edge, a protractor having a graduatedquadrant pivoted in said handle and an arm on said quadrant, saidprotractor being swingable on said pivot to project said arm from saidstraight edge in different angular positions relative thereto, saidstraight edge having an edge notch forming a pointer radial to saidquadrant for registration with said graduations in ditferent angularpositions of said arm, said handle having a pair of rear corner lugsprovided with flat faces lying in a plane perpendicular to said straightedge for positioning against a surface to space the protractor from saidsurface in finding different angles relative to said surface with saidprotractor.

References Cited in the file of this patent UNITED STATES PATENTSGifford June 10, Callihan Oct. 3, Hamel May 20, Kohler July 28, RegnierSept. 19, Putney Feb. 16, Matthews Nov. 2, Norquist Dec. 28, Larson etal. Feb. 1, Shaw Apr. 5, Swenson Dec. 13, Hall July 11, Swick May 21,Brooks Aug. 20, Pedersen July 7, Dewees Feb. 27, Desrochers June 26,Palmer May 21, Collins Mar. 30, Balod July 26, Grout Aug. 16, MidgleyApr. 10, Welch Sept. 19,

FOREIGN PATENTS Switzerland May 10,

